/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.dubbo.samples;

import org.apache.dubbo.common.URL;
import org.apache.dubbo.rpc.Invocation;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.RpcException;
import org.apache.dubbo.rpc.cluster.loadbalance.RandomLoadBalance;

import java.net.InetAddress;

import java.util.List;


public class UserLoadBalance extends RandomLoadBalance {

    @Override
    public <T> Invoker<T> doSelect(List<Invoker<T>> invokers, URL url, Invocation invocation) throws RpcException {
        for (Invoker t : invokers) {
            try {
                InetAddress addr = InetAddress.getLocalHost();
                String ip = addr.getHostAddress().toString();
                URL u = t.getUrl();
                if (u.getIp().equals(ip)) {
                    return t;
                }
            } catch (Exception e) {
                // no op
            }
        }
        return super.doSelect(invokers, url, invocation);
    }
}
